• Korean journal of food and cookery science
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• v.16 no.6
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• pp.644-651
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• 2000

This study was carried out to evaluate the effects of fractions of methanol(MeOH) extracts of Lycopus lucidic Turcz on hyperglycemia and energy metabolites in streptozotocin(STZ) diabetic rats. Diabetes mellitus was induced in male Sprague-Dawley rats weighing 200-220 g by an injection of STZ dissolved in a citrate buffer into the tail vein at a dose of 45 mg/kg of body weight, and the rats were divided into 7 groups, that is, one normal group and 6 diabetic groups: STZ-control, hexane, chloroform(CHCl$\sub$3/). ethylacetate(EtOAc), butanol(BuOH) and H$\sub$2/O fraction-fed groups. All groups were fed an AIN-93 diet and the fractions of Lycopus lucidic Turcz were administered orally with 2 % Tween 80 for 14 days after the STZ injection. Body weight, diet intake and organ weights were monitored. The plasma levels of blood glucose, insulin and protein were determined. The plasma concentrations of cholesterol, HDL-cholesterol, triglycerides and free fatty acid were assayed. The plasma activities of aspartate aminotransferase (AST) and alanine aminotransferase(ALT) were also measured. Body weight losses were observed by feeding the fractions of Lycopus lucidic Turcz in STZ experimental groups, and the kidney weight was increased. The extent of blood glucose decrement was significantly greater in the hexane and BuOH fraction-fed groups than STZ-control group. The plasma protein level was significantly lower in the H$\sub$2/O fraction-fed group. The plasma cholesterol level was decreased in BuOH and H$\sub$2/O fraction-fed groups compared with the STZ-control group. The levels of free fatty acids in the CHC1$\sub$3/ and H$\sub$2/O fraction-fed groups were significantly decreased(p<0.05). ALT activitiy of BuOH fraction-fed group was lower than control but it was not significantly different. These results suggest that the fractions of Lycopus lucidic Turcz are capable of lowering blood glucose and fat metabolites concentrations when administered to STZ-treated rats, and AST/ALT activity and insulin levels show the possibility of therapeutic use to diabetes mellitus.

• Korean Journal of Food Science and Technology
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• v.52 no.1
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• pp.81-88
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• 2020

The biological activities of Platycodon grandiflorum (PG) root extracts have been studied intensively, whereas there are limited number of studies on PG seed extract (PGSE). PGSE was prepared by ethanol extraction, and its antidiabetic effect was evaluated in mice with type 2 diabetes (C57BLKS/J-db/db). Results indicated that the administration of high-dose PGSE (600 mg/kg, wb) significantly stabilized the blood glucose levels, as evidenced by the results of the oral glucose tolerance test. Mice treated with high-dose PGSE exhibited significantly lower serum hemoglobin A1c, insulin, and leptin levels after eight weeks of feeding trial (p<0.05). High-dose PGSE administration significantly improved glucose uptake in the femoral muscle of db/db mice by activating both IRS-1/PI3K/AKT/AS160 and AMPK phosphorylation pathways. GLUT4 translocation from the cytosol to the plasma membrane increased 1.7-fold in the PGSE high-dose group. These results suggest that PGSE has potential for development as an antidiabetic agent.

• Food Science of Animal Resources
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• v.40 no.2
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• pp.155-171
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• 2020

Fermented products, including sausages, provide several health benefits, particularly when probiotics are used in the fermentation process. This study aimed to examine the cytotoxicity (against Caco-2 and MCF-7 cell lines), antihypertensive activity via angiotensin-converting enzyme (ACE) inhibition, antioxidant capacity, antidiabetic activity via α-amylase and α-glucosidase inhibition, proteolysis rate, and oxidative degradation of fermented camel and beef sausages in vitro by the novel probiotic Lactococcus lactis KX881782 isolated from camel milk. Moreover, camel and beef sausages fermented with commercial starter culture alone were compared to those fermented with commercial starter culture combined with L. lactis. The degree of hydrolysis, antioxidant capacity, cytotoxicity against Caco-2 and MCF-7, α-amylase, α-glucosidase, and ACE inhibitory activities were higher (p<0.05) in fermented camel sausages than beef sausages. In contrast, the water and lipid peroxidation activity were lower (p<0.05) in camel sausages than beef sausages. L. lactis enhanced the health benefits of the fermented camel sausages. These results suggest that camel sausage fermented with the novel probiotic L. lactis KX881782 could be a promising functional food that relatively provides several health benefits to consumers compared with fermented beef sausage.

• Microbiology and Biotechnology Letters
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• v.50 no.2
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• pp.228-234
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• 2022

Helianthus tuberosus is perennial plant as Compositae family and is shown various physiological activities such as analgesic, antipyretic, anti-inflammatory, anti-fungal, anti-spasmodic, aperient, cholagogue, diuretic, spermatogenic, stomachic, and tonic effects. In this study, we investigated the antidiabetic and anti-inflammatory effects of pancake mixture powder (PM) supplemented with H. tuberosus (PMH) in rat skeletal muscle L6 cells and murine macrophage RAW 264.7 cells, respectively. PM and PMH inhibited in vitro α-glucosidase activity. Glucose consumption was increased by PM and PMH without cytotoxicity in rat myoblast L6 cells. Western blot analysis revealed that PM and PMH down-regulated glycogen synthase kinase (GSK)-3β activation in L6 cells. PM and PMH inhibited inflammatory mediator, nitric oxide (NO) production without cytotoxicity in LPS-induced RAW 264.7 cells. The anti-diabetic and anti-inflammatory effects of PMH was more stronger than those of PM. Anti-diabetic and anti-inflammatory effects of PMH would be due to functional characteristics of the supplemented H. tuberosus and the presence of garlic and onion used as ingredients of PM. Taken together, our results that addition of functional materials such as H. tuberosus in product has synergic effects and PMH is potential candidate for treatment of diabetes through inhibiting inflammation.

• Journal of the Korean Society of Food Science and Nutrition
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• v.45 no.12
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• pp.1732-1739
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• 2016

The general components and cyclitol compounds of ice plant (Mesembryanthemum crystallinum) were analyzed to examine the possibility of using extracts as functional food materials, the antioxidant effects and antidiabetic activities of the extracts by solvent fraction were tested. Among the mineral contents, contents of K and Na were the largest ($1,213.33{\pm}2.52$ and $545.53{\pm}12.01mg/100g$, respectively), followed by S, Ca, P, and Mg in order of precedence. Among cyclitol compounds, content of D-pinitol was the largest ($4.04{\pm}0.08mg/g$) while contents of chiro-inositol and myo-inositol were relatively small ($2.82{\pm}0.01$ and $0.25{\pm}0.01mg/g$, respectively). Among total phenol contents by solvent fraction, contents of chloroform and ethyl acetate fractions were large ($35.80{\pm}1.33$ and $23.70{\pm}0.62mg\;GAE/g$, respectively). Among antioxidant activity levels examined by DPPH, ABTS, FRAP, and lipid/MA assays, the chloroform fraction commonly showed the highest level of activity while the ethyl acetate fraction showed relatively high levels of activity. The antioxidant activity levels were proportional to total phenol contents by solvent fraction. As for antidiabetic effects, all solvent fractions showed at least 50% ${\alpha}-glucosidase$ inhibitory activity levels while the ethyl acetate, butanol, and chloroform fractions showed high levels activity of $90.33{\pm}0.40$, $87.98{\pm}0.16$, and $86.38{\pm}0.51%$, respectively. The ${\alpha}-amylase$ inhibitory actively levels were in the range of $25.63{\pm}1.45{\sim}60.34{\pm}2.67%$, which was lower than the ${\alpha}-glucosidase$ inhibitory activity levels, but the inhibitory activity levels by solvent fraction were similar. Given the above study results, ice plant can be utilized as a natural material with antioxidative and antidiabetic functionality.

• Journal of Pharmacopuncture
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• v.26 no.1
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• pp.27-37
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• 2023

Objectives: Moroccan Arbutus unedo is an essential medicinal plant; however, little is known about the biological properties of its leaves mentioned in Moroccan traditional medicine. Methods: Various standard experiments were performed to evaluate the phytochemical, antidiabetic, antioxidant, antibacterial, and acute and sub-chronic toxicity characteristics of A. unedo leaves. Results: Phytochemical screening led to the identification of several phytochemical classes, including tannins, flavonoids, terpenoids, and anthraquinones, with high concentrations of polyphenols (31.83 ± 0.29 mg GAEs/g extract) and flavonoids (16.66 ± 1.47 mg REs/g extract). Further, the mineral analysis revealed high levels of calcium and potassium. A. unedo extract demonstrated significant antioxidant and anti-diabetic activities by inhibiting α-amylase (1.350 ± 0.32 g/mL) and α-glucosidase (0.099 ± 1.21 g/mL) compared to the reference drug Acarbose. Also, the methanolic extract of the plant exhibited significantly higher antibacterial activity than the aqueous extract. Precisely, three of the four examined bacterial strains exhibited substantial susceptibility to the methanolic extract . Minimum bactericidal concentration (MBC)/minimum inhibitory concentration (MIC) values indicated that A. unedo harbor abundant bactericidal compounds. For toxicological studies, mice were administered with A. unedo aqueous extract at single doses of 2,000 and 5,000 mg/kg. They did not exhibit significant abnormal behavior, toxic symptoms, or death during the 14-day acute toxicity test and the 90-day sub-chronic toxicity test periods. The general behavior, body weight, and hematological and biochemical status of the rats were assessed, revealing no toxicological symptoms or clinically significant changes in biological markers observed in the mice models, except hypoglycemia, after 90 days of daily dose administration. Conclusion: The study highlighted several biological advantages of A. unedo leaves without toxic effects in short-term application. Our findings suggest that conducting more comprehensive and extensive in vivo investigations is of utmost importance to identify molecules that can be formulated into pharmaceuticals in the future.

• CELLMED
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• v.3 no.4
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• pp.26.1-26.7
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• 2013

Ginger (Zingiber officinale) belonging to the family Zingiberaceae is a perennial herb. It is widely distributed in tropical Asia. In India, it is cultivated mainly in Kerala, Andhia Pradesh, Uttar Pradesh, West Bengal and Maharashtra. It is one of the most common spices, which is in use since centuries for its versatile medicinal actions like antiemetic, stomachic, expectorant, anti-inflammatory, aphrodisiac etc in traditional system of medicine (Unani, Ayurveda, and Chinese medicine). It is useful for the treatment of various gastrointestinal, pulmonary, cardiovascular and sexual disorders. The phytochemical study of ginger showed the presence of many volatile oils and oleo-resins like gingerol, zinger one, zingiberol etc. Numerous experimental and clinical trials have proven ginger for its range of therapeutic activities such as antibacterial, antidiabetic, antiemetic, hypolipidaemic, hepatoprotective etc properties. The present article aims to explore traditional Unani and pharmacological activities of this herb reported till date.

• CELLMED
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• v.2 no.4
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• pp.31.1-31.7
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• 2012

Curcuma longa belongs to the family Zingiberaceae and can be found in the tropical and subtropical regions of the world. It is widely used in Asiatic countries, especially India and South East Asia where it is cultivated commercially as a condiment. Its rhizomes exhibit anti-inflammatory, anti-human immunodeficiency virus, anti-bacterial, antioxidant effects, nematocidal activities, antiproliferative and antiangiogenic activities and are of pharmaceutical importance. Another relevant medicinal property exhibited by it is antidiabetic property which is reviewed here. Studies on the efficacy of crude C.longa extracts against type 2 diabetes in murine models reveal that it demonstrates a hypoglycemic effect by lowering the blood glucose levels under in vivo conditions. Clinical studies have revealed the safety of curucmin (major principle component exhibiting pharmaceutical properties from C.longa) on humans but with very low bioavailability. In view of its effective hypoglycemic effect and its low bioavailability, further studies are needed for the characterization of the bioactive principles and formulating the development of C.longa extracts as a novel anti-diabetic therapeutic agent.

• Biomolecules & Therapeutics
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• v.22 no.1
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• pp.47-54
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• 2014

The present study was aimed to evaluate the antioxidant defense system of cinnamaldehyde in normal, diabetic rats and its possible protection of pancreatic ${\beta}$-cells against its gradual loss under diabetic conditions. In vitro free radical scavenging effect of cinnamaldehyde was determined using DPPH (1,1-diphenyl-2-dipicrylhydrazyl), superoxide radical, and nitric oxide radical. Streptozotocin (STZ) diabetic rats were orally administered with cinnamaldehyde at concentrations of 5, 10 and 20 mg/kg body weight for 45 days. At the end of the experiment, the levels of plasma lipid peroxides and antioxidants such as vitamin C, vitamin E, ceruloplasmin, catalase, superoxide dismutase, reduced glutathione and glutathione peroxidase were determined. A significant increase in the levels of plasma glucose, vitamin E, ceruloplasmin, and lipid peroxides and significant decrease in the levels of plasma insulin and reduced glutathione were observed in the diabetic rats. Also the activities of pancreatic antioxidant enzymes were altered in the STZ-induced diabetic rats. The altered enzyme activities were reverted to near-normal levels after treatment with cinnamaldehyde and glibenclamide. Histopathological studies also revealed a protective effect of cinnamaldehyde on pancreatic ${\beta}$-cells. Cinnamaldehyde enhances the antioxidant defense against reactive oxygen species produced under hyperglycemic conditions and thus protects pancreatic ${\beta}$-cells against their loss and exhibits antidiabetic properties.

• YAKHAK HOEJI
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• v.43 no.6
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• pp.818-826
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• 1999

Antidiabetic activity and mechanism of Sangbackpitang (SBPT) was examined in db/db mice, which is a spontaneously hyperglycemic, hyperinsulinemic and obese animal model. SBPT and acarbose were administered orally for 4 weeks. Fasting and non-fasting serum glucose, glycated hemoglobin and triglyceride were all reduced when compared between db/db control group and SBPT treated group. At 12th week after birth, SBPT increased an insulin secretion although statistic significance was not seen. Total activities of sucrase, maltase and lactase in SBPT treated group were all decreased when compared to db/db control. On the other hand, sucrase and maltase activities in acarbose treated groups were increased. Effect of SBPT on mRNA expression of glucose transporter(GLUT-4) was also examined. Quantitation of glucose transporter was performed by RT-PCR and in vitro transcription with co-amplification of rat-action gene as an internal standard. Muscular GLUT-4 mRNA expression in SBPT treated group was increased significantly. These results may suggest that SBPT lowered blood glucose ascribing to inhibition of glycosidase-catalyzed reaction and upregulation of muscular GLUT-4 mRNA expression.